#3 Disappearing Id while selection change

When you select another component, the previously
selected element loses its Id to "".

[Anonymous]

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In fact, I found the problem. Method updateId is called each
time actionPerformed is fired and updateId changes the id
from the one on newId textField even if the user was not
changing the id.

So I add a if(newId.isShowing()) at the beginning of
updateId.

Please verify that I made no mistake...